Add Error Handling in GetBridgeDBInstance Function

[vinayak0035]

Summary

Implement error handling in the GetBridgeDBInstance function to handle cases where the bridgeDB object is nil.

Problem Definition

Currently, the GetBridgeDBInstance function does not handle scenarios where bridgeDB may be nil. If the database fails to open for any reason, returning a nil object can lead to potential runtime panics or errors when the returned database instance is used. Adding error handling will help prevent these issues and improve the robustness of the code.

Benefits of including this feature include:

• Enhanced reliability of the application.
• Easier debugging by providing clear error messages.
• Improved user experience by avoiding crashes due to nil references.

Proposal

Modify the GetBridgeDBInstance function to include error handling. The implementation could look like this:

https://github.com/maticnetwork/heimdall/blob/master/bridge/setu/util/db.go#L16

func GetBridgeDBInstance(filePath string) (*leveldb.DB, error) {
	var err error
	bridgeDBOnce.Do(func() {
		bridgeDB, err = leveldb.OpenFile(filePath, nil)
	})

	if err != nil {
		return nil, err // Return nil and the error
	}

	return bridgeDB, nil // Return the database instance
}

This change ensures that the function returns an error if the database fails to open, allowing the caller to handle it appropriately.

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For Admin Use

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[Raneet10]

Hey @vinayak0035 thanks for flagging this! Could you maybe open a PR for this ?

[vinayak0035]

@Raneet10 PR: #1198